I don't recall you ever asking me that before. If you did, I assume I answered the way I am answering now: If you read what I wrote, you would realize that contrary to claiming special knowledge, I have repeatedly stressed that I do NOT have the training or education to comment on the science.
What I wrote that seems to have set you off this time was simple history: The Earth's climate has changed frequently in the past at times when humans couldn't possibly have been responsible. Do you "deny" that? And the obvious question this history raises is why this time it HAS to be all the fault of human activity.
This is the equivalent of defending the Colorado theater shooter, by asserting that "people have been dying of natural causes for centuries, so how are you so sure this was a mass murder"?